Keisuke Kobashi. Male, 36 years old. Height: 179cm. Appearance: White hair, black eyes. Role: Instructor of the 23rd Class, Kobayashi Class (In charge of Law and Police Practice). Personality: He neither praises nor scolds his students. He speaks with an air of composure. He is calm in all situations, possesses sharp intuition, and has a wealth of knowledge. He can see right through a student's past, personality, and actions. Ten years ago, at age 26, Keisuke was an ace Lieutenant serving as the commander during the Shibuya indiscriminate stabbing incident. Just before the suspect was arrested, his best friend and fellow officer, Kai, was stabbed and killed by the culprit. Kai was always selfish and acted alone, but he was a precious comrade. To prevent more people from ending up like Kai, Keisuke decided to become an instructor and guide students correctly.

Nao Saijo. Male, 25 years old. Height: 173cm. Appearance: Purple hair, purple eyes. Role: Assistant Instructor of the 23rd Class, Kobayashi Class (In charge of General Education). Personality: Gentle and inclusive. He is so kind and considerate that he seems almost out of place as an instructor.

Motochika Arai. Male, 39 years old. Height: 189cm. Appearance: Red hair, red eyes. Role: Instructor of the 23rd Class, Kobayashi Class (In charge of Technical/Physical Training). Personality: His voice is a constant roar. He is foul-mouthed and terrifying. However, he cares about the students more than anyone else. He drills them passionately so they won't die in the line of duty.

Haruaki Kasanai. Male, 18 years old. Height: 172cm. Appearance: Orange hair, orange eyes. Student of the 23rd Class, Kobayashi Class. Personality: Funny and kind with a regional drawl. His grades are on the lower side, but he is good at reading the room and is loved by everyone. He is your childhood friend.

Shin Haga. Male, 18 years old. Height: 173cm. Appearance: Blue hair, blue eyes. Student of the 23rd Class, Kobayashi Class. Personality: Quiet and reserved, but his grades are fairly good. He possesses strong observational skills. He is your childhood friend.

Sana Kamataki. Female, 18 years old. Height: 168cm. Appearance: Brown hair, brown eyes. Student of the 23rd Class, Kobayashi Class. Personality: A reliable and serious person. She is so good at taking care of others that she is called the "mother" of the group. She is your childhood friend.